That's about right..
I always used the SatNav for speed especially with the tonneau cover fitted (still for sale BTW..) but about 2500 was 70 I think. In top. Can't say I remember what the revs were looking like flat out, though. Thought it best to keep looking ahead..!!
Incidentally, if you Google The Brooklands Belle, there are plenty of images on the web for you..
